CN105573028B - Optical imagery processing system - Google Patents
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- CN105573028B CN105573028B CN201410542706.0A CN201410542706A CN105573028B CN 105573028 B CN105573028 B CN 105573028B CN 201410542706 A CN201410542706 A CN 201410542706A CN 105573028 B CN105573028 B CN 105573028B
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0856—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors
- G02B17/086—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors wherein the system is made of a single block of optical material, e.g. solid catadioptric systems
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/48—Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus
- G03B17/54—Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus with projector
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/28—Reflectors in projection beam
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2206/00—Systems for exchange of information between different pieces of apparatus, e.g. for exchanging trimming information, for photo finishing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
Abstract
The present invention provides a kind of optical imagery processing system, wherein, system includes screen, incident light source and at least one optical transport medium, and optical transport medium is arranged at by incident light source outgoing, in the optical imaging path for projecting to screen；The plane of incidence of optical transport medium is towards incident light source, the exit facet screen-oriented of optical transport medium；Wherein, include at least one cavity between the plane of incidence and exit facet of optical transport medium, the cross sectional shape of cavity is isosceles trapezoid or the hexagon being made up of two isosceles trapezoids, and cavity includes light transmission region and the light blanking area for housing object, optical imaging path bypasses light blanking area, optical transport medium is passed through via light transmission region, so as to which the object is invisible when nontransparent object is positioned over into light blanking zone, it can solve in existing optical projection system, the method that nontransparent object is integrated on screen, which exists, realizes the problem of difficulty is larger.
Description
Technical field
The present embodiments relate to optical technical field, more particularly to a kind of optical imagery processing system.
Background technology
With the development of shadow casting technique, in the market occurs in that increasing low cost, the short focus projection products of high brightness.
Using the array of multiple such short focus projection compositions, seamless large scale can be constructed and show system.It is general with projection
And, similar large scale shows that the cost of system will be reduced constantly, it is possible to for meeting and home entertaining.Actually should
During, if the screen of display is larger, the cooperation of supporting structure is needed when screen is installed.Screen as simultaneously
During for video communication, in addition it is also necessary to consider the arrangement of rational camera.These problems will all turn into when screen size becomes big
Technical problem.
But in the prior art, supporting structure is often constituted for non-transparent material, for before drop shadow effect is not influenceed
The problem of how supporting structure being arranged on screen surface is put, there is presently no effective solution.In addition, for handle
The method that acquisition system is integrated on display screen is mainly to have is arranged on screen center camera and collection len.By
Perforate or make screen on screen using the changeable scatterer of electricity and allow camera to photograph the scene before screen.Example
Such as, used on the screen of back projecting system PDLC (polymer dispersed liquid crystal,
PLDC), the characteristic of liquid crystal is utilized so that screen is transparent within the regular hour, so as to gather image.
However, the above-mentioned greatest drawback for making screen using electric changeable material is that camera can only be in screen transparent moment
Image is gathered, therefore it is required that camera has higher sensitivity.In addition, camera shutter must possess very short startup and/close
The time is closed to avoid scintillation effect, while complexity synchronization system must also be provided, to ensure the synchronization of camera and screen.
Therefore, in the prior art, the nontransparent object such as acquisition system or supporting structure is integrated on display screen
Method, which exists, realizes the problem of difficulty is larger.
The content of the invention
The embodiment of the present invention provides a kind of optical imagery processing system, will be non-to solve in existing optical projection system
The method that bright object is integrated on display screen, which exists, realizes the problem of difficulty is larger.
First aspect there is provided a kind of optical imagery processing system, including：
Incident light source, screen and at least one optical transport medium, the optical transport medium are arranged at by the incidence
In light source outgoing, the optical imaging path for projecting to the screen；
The plane of incidence of the optical transport medium towards the incident light source, the exit facet of the optical transport medium towards
The screen；Wherein, at least one cavity is included between the plane of incidence and exit facet of the optical transport medium, the cavity
Cross sectional shape is isosceles trapezoid or the hexagon being made up of two isosceles trapezoids；
The cavity includes light transmission region and the light blanking area for housing object, the optical imagery road
Footpath bypasses the light blanking area, and the optical transport medium is passed through via the light transmission region.
In the first possible implementation of first aspect, the cavity includes：
The first incident face is carried out for the incident light that the incident light source is launched；
The second face reflected for the incident light；
The 3rd face of outgoing is carried out for the incident light；
Wherein, first face and the 3rd face respectively constitute two waists of the isosceles trapezoid；If the incident light exists
When incidence point on first face is the midpoint of side waist of the isosceles trapezoid, then the incident light is on the 3rd face
Eye point for the isosceles trapezoid opposite side waist midpoint.
According to the first possible implementation of first aspect, in second of possible implementation of first aspect,
Second face is attached for increasing the plated film of reflectance factor.
According to the first possible implementation of first aspect, in first aspect in the third possible implementation,
Incidence angle of the incident light in first inclined plane is less than the angle of total reflection.
In the 4th kind of possible implementation of first aspect, the cross sectional shape of the light blanking area is isoceles triangle
Shape or the quadrangle being made up of two isosceles triangles.
According to the 4th of first aspect the kind of possible implementation, in the 5th kind of possible implementation of first aspect,
The object that light blanking area in the cavity of the optical transport medium is housed includes the support bar and image of the screen
At least one in collecting device.
According to first aspect, first aspect the first, second, the third, the 4th kind or the 5th kind it is possible realize
Mode, in the 6th kind of possible implementation of first aspect, the screen includes rear projection screen, and the incident light source includes throwing
Shadow machine.
Optical imagery processing system provided in an embodiment of the present invention, wherein, system includes screen, incident light source and at least one
Individual optical transport medium, optical transport medium is arranged at by incident light source outgoing, in the optical imaging path for projecting to screen；Light
The plane of incidence of transmission medium is learned towards incident light source, the exit facet screen-oriented of optical transport medium；Wherein, optical transport medium
The plane of incidence and exit facet between include at least one cavity, the cross sectional shape of cavity is for isosceles trapezoid or by two isosceles trapezoids
The hexagon of composition, and cavity includes light transmission region and the light blanking area for housing object, optical imagery
Path bypasses light blanking area, optical transport medium is passed through via light transmission region, so that nontransparent object be positioned over
The object will not shut out the light transmission during light blanking zone, cause shade, can solve in existing optical projection system, will be nontransparent
The method that object is integrated on screen, which exists, realizes the problem of difficulty is larger.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the interface schematic diagram of optical transport medium；
Fig. 2 is transmission schematic diagram of the light in cavity；
Fig. 3 is the schematic diagram of light blanking area；
When Fig. 4 is different housing depths, the relation of blanking area width and incidence angle；
When Fig. 5 is different housing depths, the relation of blanking area height and incidence angle；
When Fig. 6 is different housing depths, blanking area height and the relation of blanking area width；
Fig. 7 is the relation schematic diagram of the transfer rate that S is polarized and P polarization light is transmitted in Dove cavity and incidence angle；
Fig. 8 is the reflectivity of different polarized lights and the relation schematic diagram of incidence angle；
Fig. 9 is the model plan of Dove cavity blanking screen support bar；
Figure 10 is the model stereogram along the support bar blanking of screen orientation；
Figure 11 is the schematic perspective view for the Dove cavity model for including camera module, circuit board and gathering hole；
Figure 12 is the side schematic view for the Dove cavity model for including camera module, circuit board and gathering hole；
Figure 13 is the contrast schematic diagram for reducing collection hole size using optics bar；
Figure 14 is the top schematic diagram for the Dove cavity model for including camera module, circuit board and gathering hole；
Figure 15 is the interface schematic diagram for double Dove cavitys that medium is lucite；
Figure 16 is the structure design schematic diagram for being provided with camera module and related circuit plate；
Figure 17 is the side view light Propagation Simulation figure for being provided with camera module and related circuit plate；
Figure 18 is the structural representation of the optical projection system comprising blanking optical module；
Figure 19 is the structural representation of another optical projection system comprising blanking optical module；
Figure 20 is a kind of structural representation of optical projection system comprising multiple blanking optical modules；
The schematic diagram for the projection matrix that Figure 21 constitutes for the optical projection system comprising single blanking module.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creation work is not made, belongs to the scope of protection of the invention.
In order to solve in existing optical projection system, the method that acquisition system is integrated on display screen, which exists, realizes difficulty
, can be opaque using optics hidden technology in larger the problem of, the optical imagery processing system described in the embodiment of the present invention
Object be integrated into preceding throwing or the rear projection screen in existing optical projection system, or be integrated into projecting light path, will not also produce
The shade of organism；And optical imagery processing system provided in an embodiment of the present invention does not need complicated control circuit, structure letter
It is single, easily fabricated, compact conformation, it is easy to integrated with optical screen, it is easy to reliably, be firmly installed.
The embodiment of the present invention provides a kind of optical imagery processing system, including：Screen, incident light source and at least one optics
Transmission medium；Optical transport medium is arranged at by the incident light source outgoing, in the optical imaging path for projecting to the screen；
The plane of incidence of the optical transport medium is passed towards the incident light source, and the incident light perpendicular to the optics
The plane of incidence of defeated medium is incident, and the exit facet of the optical transport medium is close to the screen, or optical transport medium position
In the optical imaging path of the system；
Wherein, the plane of incidence of the optical transport medium is towards the incident light source, the outgoing of the optical transport medium
Face is towards the screen；Wherein, at least one cavity is included between the plane of incidence and exit facet of the optical transport medium, it is described
The cross sectional shape of cavity is isosceles trapezoid or the hexagon being made up of two isosceles trapezoids；Cavity includes light transmission range
Domain and the light blanking area for housing object, the optical imaging path bypasses the light blanking area, via described
Light transmission region passes through the optical transport medium.
Specifically, the cross sectional shape of light blanking area is isosceles triangle or is made up of two isosceles triangles
Quadrangle.
It should be noted that in order to describe simplicity, foregoing mentioned cavity can be designated as into Dove cavity.
For example, the screen includes rear projection screen, and the incident light source includes projector.The optical transport medium
Cavity in the light blanking area object that is used to place include but is not limited to the support bar and/or phase of the rear projection screen
Machine.
For example, it is provided with collection hole corresponding with the collection visual angle of the camera in the front end of the rear projection screen.
Optics bar is provided between the front end of the camera and the rear projection screen, to the basis at the collection visual angle for keeping the camera
On, reduce the collection hole size that the front end of the rear projection screen is set.
The optical transport medium included using the optical imagery processing system described in the embodiment of the present invention, be by collection easily
System (such as camera or camera) is placed on the light blanking area formed in the cavity of optical transport medium, and will not produce
The shade of acquisition system, therefore, it can solve in existing optical projection system, acquisition system is integrated into the method on display screen
In the presence of realizing the problem of difficulty is larger
Based on above-mentioned optical imagery processing system, the incident light through cavity will be spun upside down, thus optics into
As the incident image on path will also be spun upside down, the embodiment of the present invention also provides a kind of projector, including：Processor and transmitting
Device.
Processor, target area and trip shaft for determining image；During the target area is described image, by passing through
Cross the region that the incident light of the cavity transmission is projected；During the trip shaft is the target area, using by described
The straight line that the incident light that the waist midpoint of isosceles trapezoid is transmitted is projected；The target area is carried out along the trip shaft
Upset is handled, and obtains the incident image after upset processing.
Transmitter, for launching incident light, to be carried out using the incident light to the image after the progress upset processing
Projection.
It is along trip shaft pair using the projector described in the embodiment of the present invention because light refraction can cause Image Reversal
Target area carries out pre- upset processing so that after optical transport medium, exit image is consistent with incident image.
The specific implementation of the system described in the embodiment of the present invention is described in detail below by accompanying drawing：
The embodiment of the present invention is by taking the integrated camera in rear projection screen and support member as an example.The program can also be aobvious with others
Show that technology such as front projection screen and flat-panel display devices are used cooperatively.
The optical transport medium of the embodiment of the present invention has used the abovementioned cavity Jing Guo optimization design, i.e. Dove cavity, Fig. 1
For the interface schematic diagram of optical transport medium, as shown in figure 1, medium includes the cavity full of air, wherein, the refraction of air
Coefficient nA.The section of cavity is trapezoidal, is n positioned at refraction coefficientSAnd width is in Sw medium.Cavity prolongs along medium Z-direction
Stretch, trapezoid cross section is determined by coordinate points P1, P2, P3, P4.Wherein, the cavity includes the first inclined plane of P1 and P2 compositions, P2
Second inclined plane of the top surface constituted with P3, P3 and P4 compositions, and the bottom surface of P1 and P4 compositions are constituted.If incident light is first
Inclined plane is incident, then it is the first face to remember the first inclined plane, and note top surface is the second face, and the second inclined plane of note is the 3rd face.
Fig. 2 is transmission schematic diagram of the light in cavity, as illustrated in fig. 2, it is assumed that the light perpendicular to medium incident face shines
It is mapped on cavity.Inclination angle between first inclined plane of cavity and bottom surface is B, therefore, the first inclined plane of incident light and cavity
Between angle be B, incidence angle of the incident light in the first inclined plane of cavity is A=90-B.Assuming that incident light is refracted into
Angle C, then
Wherein, nSFor the refractive index of medium, nAFor the refractive index of air.
Incident light incides the top surface of cavity, D=C-A with angle D.Incident light is reflected to the second inclined plane of cavity,
Then the direction vertical with medium exit facet is refracted again in the second inclined plane again.Ideally, it is intended that
One inclined-plane midpoint incident light is projecting cavity with the position of incidence point identical height (y-coordinate).This requires cavity to be symmetrical
's.Assuming that d is the half (from midpoint to the first inclined plane) of the middle line width of cavity, h is that the first inclined plane midpoint is inclined to first
Inclined-plane bottom wedge angle is in the distance in y directions, and d, h and incident angle relation are determined by below equation：
Wherein w is the height of cavity.
If with P1For origin, the coordinate that can obtain 4 summits of cavity is：
1)P1=(0,0)
2)P2=(2h, w)
3)P3=(2d, w)
4)P2=(2d+2h, 0)
Inclination angle theta in Fig. 2R=pi/2-D.This angle is relative to the incident angle in top reflective face.The angle is determined
Transmission path of the light in cavity.
Utilize optical software Zemax simulation calculations, it can be deduced that, there is the region that a section is triangle in cavity,
The region does not have what light passed through.Object is placed wherein and does not interfere with the transmission of light, therefore can turn into light blanking zone
Domain.Fig. 3 is the schematic diagram of light blanking area, as shown in figure 3, it is p, width that the scope of the light blanking area, which is a height,
For 2lIsosceles triangle.Wherein l=d+h.As can be drawn from Figure 3：P=(d+h) tan (D).
Thus, it is possible to obtain the light blanking area of a triangle along bottom surface direction.
In the embodiment of the present invention, it can also be used in optical transport medium in double Dove cavitys symmetrical above and below, i.e. chamber
The hexagon that the cross sectional shape of body isosceles trapezoid shown in two Fig. 2 is constituted, then light blanking area will have diamond structure, i.e.,
The quadrangle that the isosceles triangle shown in two Fig. 3 is constituted, then the height increase of light blanking area is 2p.
It should be noted that when the angle of the inclined plane of cavity first and bottom surface is constant, during the dioptric system increase of medium,
Refraction angle will increase, and light blanking area width will reduce, and light blanking area height will increase.The dioptric system of medium reduces
When, refraction angle will reduce, and light blanking area width will increase, and light blanking area height will reduce.
Lower surface analysis is in different housing depth w, light blanking area width 2l, light blanking area height p and incidence
Angle A relation：
When Fig. 4 is different housing depths, the relation of blanking area width and incidence angle, as shown in figure 4, in housing depth w
Respectively 3,4,5,6 millimeters when, blanking area width 2L and incidence angle A relation, it is assumed that when the dioptric system of medium is 1.5,
The incidence angle A upper limit (critical angle) is 41.8 degree, and the incident light more than 41.8 degree will produce total reflection in cavity first surface.Can
To find out, when incidence angle A increases, blanking area width will reduce；When housing depth w increases, blanking area width will increase
Plus.
When Fig. 5 is different housing depths, the relation of blanking area height and incidence angle, as shown in figure 5, being in housing depth
3rd, 4,5,6 millimeters when, the relation of blanking area height and incident angle, it can be seen that when incident angle increase, blanking area
Height can also increase, particularly close to during critical angle.
When Fig. 6 is different housing depths, blanking area height and the relation of blanking area width, as shown in fig. 6, in cavity
When being highly respectively 3,4,5,6 millimeters, blanking area height and the relation of blanking area width are inversely proportional.
It should be noted that light is transmitted in cavity needs the refraction twice by first, second inclined plane and top surface
Primary event.In the cavity that pure dielectric is constituted, reflection loss can be observed on three surfaces.These losses can be with
Calculated and obtained by Fresnel reflection/transmission coefficient for S polarization and P polarization of standard.
Fig. 7 is the relation schematic diagram of the transfer rate that S is polarized and P polarization light is transmitted in Dove cavity and incidence angle, such as
Shown in Fig. 7, it is assumed that the refraction coefficient of medium is 1.5.It can be seen that, during for 20 degree of minimum incidence angles, S polarization and P polarization
Efficiency of transmission be 0.45 and 0.2 respectively.In incidence angle increase, efficiency of transmission will decline, in the critical angle 41.8 of incidence angle
When spending, due to being totally reflected, transfer rate will be changed into 0.Transfer rate is only relevant with incidence angle, unrelated with housing width.
In small incidence angle, efficiency of transmission depends primarily on the reflection loss of top surface.In big incidence angle, transfer rate depends on
With the Fresnel loss of first, second inclined plane of cavity.For the Dove cavity in the present invention, if incidence angle is A, top surface
Angle of reflection be：
Wherein, nSFor the refractive index of medium, nAFor the refractive index of cavity.
In the present invention, it is assumed that when the refraction coefficient of medium is 1.5, the biography analyzing incidence angle from 20 degree to 41.8 degree
Defeated rate.20 degree are one and can obtain the incidence angle of appropriate blanking area width, and 41.8 degree are that the inclined plane of cavity first can occur
The critical angle of total reflection.The angle of reflection of corresponding cavity top surface is 79.1 degree to 41.8 degree.
In order to detect the effect of top reflective, it can analyze to S- polarization, P- polarization and average polarization (non-polarized)
Incident light, the reflectivity of its air/dielectric surface and the relation of incidence angle.Fig. 8 is the reflectivity and incidence angle of different polarized lights
Relation schematic diagram, as shown in Figure 8, it is assumed that medium refraction coefficient be ns=1.5, it should be pointed out that, in fig. 8, the angle of x-plane
It is θR.When incidence angle increase, the reflectivity of S- polarization light will increase, and reflectivity reaches when in 90 degree of incidence angle
100%.P polarization light reflectance will be reduced, and when angle is Brewster angle, reflectivity is 0, is then stepped up, when entering
When firing angle degree reaches 90 degree, reflectivity is increased up 100%.
The top reflective rate of different polarized lights and the variation relation of angle of reflection are as follows：
1) for P polarized lights, angle of reflection θRFor 41.8 degree when, top reflective rate be 1.2%, angle of reflection θRFor 79.1 degree when,
Top reflective rate is 20.6%.In angle of reflection θRDuring for Brewster angle, top reflective rate is 0；
2) for S- polarized lights, angle of reflection θRFor 41.8 degree when, top reflective rate be 8.2%, angle of reflection θRFor 79.1 degree
When, top reflective rate is 51%；
3) for non-polarized light, angle of reflection θRFor 41.8 degree when, top reflective rate be 4.7%, angle of reflection θRFor 79.1 degree
When, top reflective rate is 35.8%.
In order to reduce loss, it is necessary to reduce the reflectivity of top surface., can be by increasing aluminium in cavity top surface in the present embodiment
Plated film, now, for the non-polarized light of any incident angle, its reflectivity changes is between 95% to 90%, it is obvious that transmission
Rate is also greatly improved.Assuming that medium refraction coefficient is ns=1.5, emulation experiment is obtained：S- polarizes light in low incidence
Transmission loss is minimum during angle, the light that P- polarizes loss reduction in 36.4 degree of incidence angle (transfer rate is 77.9%).
In the embodiment of the present invention, it can be increased with the method for coating process or installation reflective aluminum band in the top surface of Dove chamber
Aluminium reflecting surface.Transmission loss can also be reduced by limiting the method for projection only transmitting S- polarized lights.Ideally, may be used
In the method being combined using line holographic projections technology with metal mirror.This method can redistribute light to overcome Dove chamber
The loss of body, while bringing the influence of minimum to projection efficiency.
Assuming that above-mentioned optical transport medium is applied in back projecting system, spelled if necessary to construction by multiple rear projection screens for one
The giant-screen of composition is connect, such as 2 × 2 screens or bigger screen, a kind of method is to provide branch using the metallic rod along screen
Support structure is supported, still, and metallic rod will block a part of image, and utilize optical transport medium of the present invention,
Can be using the light blanking area in the Dove cavity in medium come concealed metal bar.
Fig. 9 is the model plan of Dove cavity blanking screen support bar, and Figure 10 is the support bar blanking along screen orientation
Model stereogram, as shown in the figure：
From the incident light in left side, incident light is worn after superrefraction and reflection in cavity region by dull thread is formed
Blanking area more.In this blanking area, the metal tube of support can be placed, projection ray will be around metallic rod transmission,
Therefore on the right side of screen, metal tube will be invisible.Because being screen diffusion layer on the right side of medium, come from screen right side
Illumination light will be scattered by diffusion layer, therefore can not also see the metal tube of supporting construction from lighting source.
In above-mentioned design, the light through cavity will be spun upside down, therefore, and projected image will also be spun upside down, this
Embodiment corrects the upset of this projected image using corresponding upset algorithm.
With XijThe pixel coordinate point of incident image is represented, wherein i represents line number (pixel coordinate in y directions), and j is columns (x
The pixel coordinate in direction).
Assuming that cavity is placed in the horizontal direction, obtain incident image and tilted by the cavity in optical transport medium first
Picture element position information X on faceij, i=m ..., m+k；J=n ..., n+L；Wherein m, n represent the image starting corresponding to cavity
Position, k, L represents the picturedeep and columns corresponding to cavity.
Upset processing is carried out to the picture element position information, the incident image X ' after upset processing is obtainedij,X′ij=
Xi+k-s,j, wherein s=1 ..., k；J=n ..., n+L；
After being handled by upset, the incident image after the upset processing is obtained by the cavity in the second inclined plane
On picture element position information, you can obtain exit image corresponding with the incident image.
For example, for double Dove chambers symmetrical above and below, upset is processed as：
With XijIncident image is represented, wherein i represents line number, and j is columns；Assuming that cavity is placed in the horizontal direction, incidence figure
As being X by picture element position information of the cavity in optical transport medium in the first inclined planeij, wherein, i=m ..., m+2k；
J=n ..., n+2L, wherein, n represents the image original position corresponding to cavity, and 2k, 2L represents the image line corresponding to cavity
Number and columns.
The picture element position information of incident image after upset processing is：
X'i+k-s,j=Xi+s-1,j；X'i+k-s,j=Xi+2k-s,j；Wherein s=1 ..., k；J=n ..., n+L；
Upset Processing Algorithm can be realized by the hardware or software in optical projection system.It is for what many projections were merged
System, the upset Processing Algorithm can also be realized in projection fusion treatment software.Because can be using image processing software therewith
Coordinate, therefore, elimination of hidden of the invention can be simplified.
In above-mentioned emulation, it is assumed that the angle of incident light and the inclined plane of cavity first is 30 degree.The refraction coefficient of medium is
1.5, available blanking zone is triangle, and the length (blanking area width) of triangle base is 14.2 millimeters, is highly 2
Millimeter.The size of cavity can highly will be reduced to 1 millimeter with linear expansion, if width halves.
Support bar shown in figure can be fixed on cavity by way of paste.Paste will not expand to blanking zone
Outside.
In example below, illustrated by using double Dove prism cavitys to install with exemplified by blanking camera, camera mould
The key parameter of group is as follows：
Size sensor：1/6inch
Valid pixel：1296 × 976 (1,260,000 pixels)
Pixel Dimensions：1.9 microns × 1.9 microns
Module size (length/width)：5.2 millimeters × 4.4 millimeters
Module height：3.2 millimeter
Aperture：2.8
Visual angle：63 ° (diagonal)；
Power consumption：135mW；
Camera module is connected on motherboard to provide power supply, control signal and output image using ball array pin.It is false
It it is highly 4.4 millimeters if motherboard is along blanking cavity Directional Extension, length is 24 millimeters, and motherboard thickness is less than 0.5 millimeter.
Camera module is integrated with wafer camera, and profile is taper, 5.2 millimeters × 4 millimeters of floor space, and cone height is
3.2 millimeters, the area at top is 3.1 millimeters × 3.1 millimeters.63 degree of bellmouth is opened on the medium of screen Dove cavity, is made
Bellmouth is obtained with identical with camera perspective without influenceing collection.
Assuming that cavity clear height is 5 millimeters, according to the symmetry characteristic of double Dove cavitys, p=2.5 millimeters.If it is assumed that projection
Emergent ray is P polarized lights, and the refraction coefficient of screen dielectric layer is 1.5.Optimized incidence is 36.4 degree.Selection P- polarized lights be because
It is maximum for its efficiency of transmission highest and incidence angle, thus more compact construction can be supported.
A=36.4 °
P=2.5mm
W=3.657mm
H=1.348mm
D=3.669mm
L=10.033mm
P1, P2, P3, P4 coordinate is respectively：
P1=(0,0)
P2=(2.696,3.657)
P3=(7.336,3.657)
P2=(10.033,0)
It is further assumed that the dielectric thickness in Dove cavity or so is 1 millimeter, then the width of whole medium is 12 millimeters；
System model is constructed using Zemax, and adjusting parameter causes camera model to be placed exactly in the blanking zone of cavity, is imaged simultaneously
Bore dia is just matched with 63 degree of visual angles.
Figure 11 is the schematic perspective view for the Dove cavity model for including camera module, circuit board and gathering hole, Tu12Wei
Include camera module, circuit board and gather the side schematic view of the Dove cavity model in hole, as shown in figure 11, including：Double morals
Cottonrose hibiscus cavity, camera module, daughter board, collection hole and the screen dispersion layer on the right side of collection hole.Wherein, being designed as hole is gathered
Just camera module is allowed to be worked at 63 degree of visual angles.Cone-shaped cavity is changed into 2.2 millimeters for 4.4 millimeters from full-size.Drawn in figure
The light being distributed in y directions umbrellas passes through cavity.It can be recognized from fig. 12 that light is not blocked by camera module or daughter board.
In order to expand blanking interval to accommodate associated components, it is necessary to increase p value to 3 millimeters, therefore, the width of screen will also increase accordingly
It is added to 12 millimeters.
But, as seen from Figure 12, although y directions have scattered light through screen, and block not any.But,
Because the maximum gauge for gathering hole is 4.4 millimeters, the image in 4.4 millimeters will be lost, therefore, the embodiment of the present invention
In, the opticator of camera is expanded to using optics pole the surface of screen, Figure 13 is to reduce collection hole size using optics bar
Contrast schematic diagram, as shown in figure 13, the imaging surface of camera can be shifted to an earlier date, using this scheme collection hole can be reduced to 3
Millimeter.
Figure 14 is the top schematic diagram for the Dove cavity model for including camera module, circuit board and gathering hole, such as Figure 14
Shown, daughter board can expand to 24 millimeters, and enough spaces can be so provided for the electrical interface of camera.The connection electricity of camera
Cable (power supply, control line, signal wire) can be arranged along the direction of cavity, can also transmit data using WIFI or optical signal
And power supply.
In actual use, for also needing to design specific structure during middle installation camera in double Dove cavitys so that
The camera of installation does not interfere with projection ray.A kind of transparent installation camera is described below while not influenceing the transmission of light
Mechanical structure.Figure 15 is the interface schematic diagram for double Dove cavitys that medium is lucite, as shown in figure 15, and blanking area is in water chestnut
Shape, height 2p, width 2 (d+h) if light will be stopped by carrying out installing component using metal support, therefore can be used transparent
Optical texture is supported.
Supporting construction is made using transparent material, such as lucite.In order to ensure that the transmission of incident light is not deflected, if entering
It is during the midpoint of the side waist for the isosceles trapezoid for penetrating incidence point of the light in first inclined plane to constitute cavity cross-section, then incident
Eye point of the light in second inclined plane is the midpoint of the opposite side waist of the isosceles trapezoid.In addition, in supporting construction
Upper and lower surface also needs to aluminium plated film, to minimize reflection loss.Front and rear surfaces are preferably able to using anti-reflection film minimize transmission
Loss.
Figure 16 is the structural upright schematic diagram for being provided with camera module and related circuit plate, and as shown in figure 16, circuit board is straight
Connect on support frame, there is perforate to accommodate camera on support frame.
Figure 17 is the side view light Propagation Simulation figure for being provided with camera module and related circuit plate, and this emulation make use of
Zemax model.As can be seen that not being deformed during light traverses support bar.Therefore can be very reliably camera and electricity
Road plate is installed in cavity without producing any shade.Assume to have used aluminized coating in upper and lower surface in simulations.
Using such scheme, the embodiment of the present invention can construct the optical projection system for being integrated with hiding camera device, Figure 18
For a kind of structural representation of optical projection system comprising blanking optical module, as shown in figure 18, optical projection system includes projector, rear-projection
Screen and positioned at being close to screen, (optical delivery equivalent to foregoing description is situated between the optical module on projector's optical axis
Matter), the optical module includes Dove cavity.According to foregoing design method, blanking area can be with blanking in the Dove cavity
Object wherein.Therefore support frame, acquisition module etc. can be installed wherein.
Figure 19 is the structural representation of another optical projection system comprising blanking optical module, in actual system, optics
Module (equivalent to the optical transport medium of foregoing description) may need to be installed to the position of non-optical axis.Now need according to optics
The shape for the position adjustment Dove cavity that module is placed.According to design above, adjustment needs to meet following two conditions：
A, needs to ensure that the direction towards projection of optical module is vertical with incident light holding；
B, the axis of Dove chamber and incident parallel light.
Further,, can be according to each blanking area according to above-mentioned principle when needing multiple blanking areas in system
The need for the position placed, design different optical modules, Figure 20 is a kind of optical projection system comprising multiple blanking optical modules
Structural representation.
Using multiple optical projection systems presented hereinbefore, projection matrix can be constituted, Figure 21 is to include single blanking module
The schematic diagram of the projection matrix of optical projection system composition.
Technical scheme described in the embodiment of the present invention can on rear projection screen integrated opaque object it is cloudy without producing
Shadow.It therefore, it can use mechanical support structure on screen and integrated acquisition system be without influenceing picture quality.It is of the invention real
The scheme for applying example can be applied equally in other occasions, such as active display.
Further, system architecture provided in an embodiment of the present invention is very simple, it is only necessary to refraction, primary event twice.
Because blanking area has inverted the image by its transmission, therefore this parts of images can be entered using digital image processing method
Row upset processing recovers its image again, can keep the uniformity of whole system image, compact and simple cavity body structure can
To ensure simple and inexpensive manufacture.
, can be by others side in several embodiments provided herein, it should be understood that disclosed system
Formula is realized.For example, device embodiment described above is only schematical, for example, the division of the unit, only one
Kind of division of logic function, can there is other dividing mode when actually realizing, such as multiple units or component can combine or
Another system is desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or discussed it is mutual it
Between coupling or direct-coupling or communication connection can be the INDIRECT COUPLING or communication link of device or unit by some interfaces
Connect, can be electrical, machinery or other forms.
The unit illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modifications or replacement, the essence of appropriate technical solution is departed from the protection model of various embodiments of the present invention technical scheme
Enclose.
Claims (10)
1. a kind of optical imagery processing system, it is characterised in that including：Incident light source, screen and at least one optical delivery are situated between
Matter, the optical transport medium is arranged at by the incident light source outgoing, in the optical imaging path for projecting to the screen；
The plane of incidence of the optical transport medium is towards the incident light source, and the exit facet of the optical transport medium is towards described
Screen；Wherein, at least one cavity, the section of the cavity are included between the plane of incidence and exit facet of the optical transport medium
It is shaped as isosceles trapezoid or the hexagon being made up of two isosceles trapezoids；
The cavity includes light transmission region and the light blanking area for housing object, the optical imaging path around
The light blanking area is crossed, the optical transport medium is passed through via the light transmission region.
2. system according to claim 1, it is characterised in that the cavity includes：
The first incident face is carried out for the incident light that the incident light source is launched；
The second face reflected for the incident light；
The 3rd face of outgoing is carried out for the incident light；
Wherein, first face and the 3rd face respectively constitute two waists of the isosceles trapezoid；If the incident light is described
Incidence point on first face for the side waist of the isosceles trapezoid midpoint when, then the incident light going out on the 3rd face
Exit point is the midpoint of the opposite side waist of the isosceles trapezoid.
3. system according to claim 2, it is characterised in that
Second face is attached for increasing the plated film of reflectance factor.
4. system according to claim 2, it is characterised in that
Incidence angle of the incident light on first face is less than the angle of total reflection.
5. system according to claim 1, it is characterised in that
The cross sectional shape of the light blanking area is isosceles triangle or the quadrangle being made up of two isosceles triangles.
6. system according to claim 5, it is characterised in that the light blanking zone in the cavity of the optical transport medium
The object that domain is housed includes at least one in the support bar and image capture device of the screen.
7. the system according to claim any one of 1-6, it is characterised in that the screen includes rear projection screen, it is described enter
Penetrating light source includes projector.
8. system according to claim 7, it is characterised in that
Collection hole corresponding with the collection visual angle of image capture device is provided with the front end of the rear projection screen.
9. system according to claim 8, it is characterised in that
Optics bar is provided between the front end of described image collecting device and the rear projection screen；The optics bar is used to keep
On the basis of the collection unchanged view angle of described image collecting device, reduce the collection hole chi that the front end of the rear projection screen is set
It is very little.
10. system according to claim 7, it is characterised in that the projector includes：Processor and transmitter；
The processor, target area and trip shaft for determining image；During the target area is described image, by passing through
Cross the region that the incident light of the cavity transmission is projected；During the trip shaft is the target area, by the isosceles
The straight line that the incident light that trapezoidal waist midpoint is transmitted is projected；The target area is overturn along the trip shaft
Processing, obtains the incident image after upset processing；
The transmitter, for launching incident light, to be carried out using the incident light to the image after the progress upset processing
Projection.
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| CN201410542706.0A CN105573028B (en) | 2014-10-14 | 2014-10-14 | Optical imagery processing system |
| US14/880,880 US9588325B2 (en) | 2014-10-14 | 2015-10-12 | Optical imaging processing system |
| EP15189621.4A EP3009887B1 (en) | 2014-10-14 | 2015-10-13 | Optical imaging processing system |
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| CN201410542706.0A CN105573028B (en) | 2014-10-14 | 2014-10-14 | Optical imagery processing system |
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| US10444480B2 (en) | 2017-08-03 | 2019-10-15 | Toyota Motor Engineering & Manufacturing North America, Inc. | Cloaking devices constructed from prisms and vehicles comprising the same |
| US10351062B2 (en) * | 2017-11-15 | 2019-07-16 | Toyota Motor Engineering & Manufacturing North America, Inc. | Cloaking devices constructed from reflection boundaries and half-mirrors and vehicles comprising the same |
| US10479276B2 (en) * | 2018-04-04 | 2019-11-19 | Toyota Motor Engineering & Manufacturing North America, Inc. | Cloaking devices constructed from reflection boundaries, half-mirrors and multiband dichroic color filters and vehicles comprising the same |
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| JPH10339814A (en) * | 1997-06-06 | 1998-12-22 | Denso Corp | Image composition display device |
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| US5400069A (en) * | 1993-06-16 | 1995-03-21 | Bell Communications Research, Inc. | Eye contact video-conferencing system and screen |
| US6870670B2 (en) * | 2001-04-06 | 2005-03-22 | 3M Innovative Properties Company | Screens and methods for displaying information |
| KR100459223B1 (en) * | 2002-04-03 | 2004-12-03 | 엘지.필립스 엘시디 주식회사 | Back light |
| US8488247B2 (en) * | 2008-10-06 | 2013-07-16 | Purdue Research Foundation | System, method and apparatus for modifying the visibility properties of an object |
| US8054547B2 (en) | 2010-04-09 | 2011-11-08 | Acaji, Inc. | Rear projection dome |
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| US9417762B2 (en) | 2013-01-09 | 2016-08-16 | Northrop Grumman Systems Corporation | System and method for providing a virtual immersive environment |
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| JPS6020692A (en) * | 1983-07-15 | 1985-02-01 | Hitachi Ltd | Device for wide field of vision |
| JPH10339814A (en) * | 1997-06-06 | 1998-12-22 | Denso Corp | Image composition display device |
| JP2004057708A (en) * | 2002-07-31 | 2004-02-26 | Heiwa Corp | Projection type game machine with imaging function |
| CN101750868A (en) * | 2010-01-08 | 2010-06-23 | 浙江大学 | Panoramic space three-dimensional display device simultaneously having horizontal and pitching multiple visual fields |
| WO2014139067A1 (en) * | 2013-03-10 | 2014-09-18 | 浙江大学 | Cylindrical electromagnetic wave cloaking device |
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| EP3009887A1 (en) | 2016-04-20 |
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| EP3009887B1 (en) | 2017-08-02 |
| CN105573028A (en) | 2016-05-11 |
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